4 doctors weighed in:
What do you think causes sudden infant death syndrome?
4 doctors weighed in

Dr. Paul Christakis
Pediatrics
3 doctors agree
In brief: CO2 retention
Although not accepted universally, the current theory regarding sids is the rebreathing of co2 which is normally exhaled with each breath by all humans.
The idea is that sids is caused by the rebreathing of co2, in the prone position. Co2, which is a respiratory depressant, is rebreathed when infants inhale from a pocket of exhaled co2. This is why fans, and supine positioning is recommended.

In brief: CO2 retention
Although not accepted universally, the current theory regarding sids is the rebreathing of co2 which is normally exhaled with each breath by all humans.
The idea is that sids is caused by the rebreathing of co2, in the prone position. Co2, which is a respiratory depressant, is rebreathed when infants inhale from a pocket of exhaled co2. This is why fans, and supine positioning is recommended.
Dr. Paul Christakis
Dr. Paul Christakis
Thank
Read more answers from doctors